REST & JSON

Question 1

REST APIs: 6 attributes

Answer 1

Client/server architecture
stateless operation
clear statement of cacheable/uncacheable
uniform interface
layered
code-on-demand

Question 2

Client-server model steps:
1.
2.
3.

Answer 2

1. REST client executes REST API call, generates message to REST server
2. REST server on right has API code that considers request and decides how to reply
3. REST server sends back reply message with appropriate data variables

Question 3

Stateless operation

Answer 3

REST does not record and use info about API exchanges to process subsequent API exchanges

Question 4

Cacheable/uncacheable

Answer 4

save vs/ don’t save data for later retrieval (like for websites)

Question 5

CRUD (REST APIs)- based of HTTP verbs
C
R
U
D

Answer 5

Create
Read
Update
Delete

Question 6

CRUD:REST (HTTP)
Create:
Read:
Update:
Delete:

Answer 6

Create: Post
Get: Read
Update: Patch
Delete: Delete

Question 7

URI structure:

https: //dnac.example.com/dna/intent/api/v1/network-device
1. https://
2. dnac.example.com
3. /dna/intent/api/v1/network-device

Answer 7

1. Protocol
2. hostname/address- sits between // and first /
3. path (resource)

Question 8

Resource & parameter

https://dnac.example.com/dna/intent/api/v1/network-device?parm1=10.1.1.1…

Answer 8

Resource- /dna/intent/api/v1/network-device

Parameter- ?parm=10.1.1.1…

Question 9

JSON

1. name
2. origin
3. central purpose
4. common use

Answer 9

Javascript object notation
RFC 8259. 
General data modeling and serialization
Rest APIS
addl:
{} start and stop list
readable by human and machine.

Question 10

XML

1. name
2. origin
3. central purpose
4. common use

Answer 10

eXtensible markup language. based off HTML.
World Wide Web Consortium
Data-focused text markup that allows data modeling
Rest APIs, web pages
addl:
Variables sit between tags. slightly harder to read than JSON

Question 11

YAML

1. name
2. origin
3. central purpose
4. common use

Answer 11

YAML Aint Markup Language.
YAML.org
General data modeling
Ansible
addl:
doesn't define markup details like XML. Focuses on data model details. Easiest to read. Starts with #. Denotes variables with {{ }}

Question 12

JSON

Key:value pair

Answer 12

each colon identifies pair

Question 13

JSON

Key:

Answer 13

inside double “” before colon, used as the name that references a value

Question 14

JSON

Value

Answer 14

represents value of key-

text, numeric, array, object

Question 15

JSON

object

Answer 15

dictionary. list of Key:value pairs inside {}

Question 16

JSON

array

Answer 16

series of values inside []

Question 17

minified JSON

Answer 17

less spacing

Question 18

beautified/prettified JSON

Answer 18

more spacing for readability